Mattress-frame



R. E. CAMPBELL. Mattress Frames.

N0. 232,334. Patented Sept; 21, I880.

\TNESSES. I \N\\ENTOR.

WW k. Jan/m 615M145 16;,

flww/m, W flaw/1 Mu R, as: NGTON, u c.

UNITED STATES PATENT .OFELcE.

ROBERT E. CAMPBELL, OF CHICAGO, ILLINOIS.

MATTRESS-FRAM E.

SPECIFICATION forming part of Letters Patent No. 232,334, dated September 21, 1880. Application filed September 25, 1879.

To all whom it may concern Be it known that I, ROBERT E. CAMPBELL, of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Iniprovement in llIattress-Frames, of which the following is aspecification, in which- Figure 1 is a perspective representation of my improved mattress-frame attached to the posts of a bedstead; Fig. a vertical section of the ratchet and ratchet-stand, taken longitudinally, with the side rails of the mattress; Fig. 3, a section of the ratchet and ratchetstand, taken on line a; .r, Fig. 2; Fig. 4, a perspective representation of the pawl removed from the other parts; Fig. 5, a top view of the ratchet-stand.

The object of the present invention is to improve the bed-bottoin patented to David WV. Taylor on August 29, 1876, No. 181,605.

The nature of the invention consists in the novel construction of the ratchet, ratchet-- stand, and pawl as combined with the swell roller to hold the latter in a fixed position after it has been turned to tighten the fabric which supports the bedding.

A A represent the side rails to the mattressframe, and E E are the end bars. F is the same form of swelltension-roller shown in said Letters Patent. G G represent what I term ratchetstands, which are in bracket form, and are formed on their concave edges with recesses K, to permit a free movement of the ratchets H. The margins of these recesses are inclined inward to form bearings to fit conical journals L on both sides of the ratehets HR. The function of bearings S S is to sustain the strain put on the roller F in stretching the fabric, and the object of beveling them inward is that the conical bearings L L on the ratchet H may prevent such a 10ngitudinal movement of the roller as would cause the ratchet to grind against the ratch et-stand.

The inside prongs of the stands are formed on a line with the roller, that the wire fabric may extend to the ratchets H H.

A pawl, I, is fitted into a recess formed in the lower part of each stand G, and held in place by pivots c e. The end it of the pawl is fitted to engage the ratchet H, and the end an is weighted, so as to cause the end a to catch onto the ratchet when the roller is turned in the direction indicated by dart 3, and also to permit a free movement of the rollerin the direction of dart 2.

The stands G, rails A, and cross bars E are held together by bolts J, Fig. 2. Said bolts also pass through the shanks P P of the thimble-sockets D D, and firmly unite the parts. The thimble-sockets pass onto the posts 0 C C C, and unite the mattress-frame with the other parts to form a complete bedstead; butthis latter feature is not claimed in this application.

I elaim and desire to seeureby Letters Patent- The ratchet-stands G G, recessed at K, and formed with beveled bearings S S, in combination with the ratchets H H, forming the conical journals L, located at the sides of the ratchet, and the weighted pawls l I, placed in recesses below the ratchets H H, the bolts J J, side rails, A A, and roller F, as and for the purpose specified.

ROBERT E. CAMPBELL.

Witnesses:

WILLIAM R. MANLOVE, G". L. OHAPIN. 

